Return bend fittings for oil stills



Aug. 30, 1932. F. c. FANTZ RETURN BEND FITTINGS FOR OIL STILLS Original Filed. Dec. 8, 1951 INVENTOR I TTORNEY ea iest; et so, ma

aerator WEED C. FANTZ, OF WEBSTER GROVES, MISSOURI RETURN FITTINGS FOR 01L STILLS original application filed December 8,

My invention relates to that class of return bends such as are described inmy copending application, Serial No. 579,707, filed December 8, 1931, of which this application is a division. I

As described in that application, the housing for the return bend proper is'sectional comprising four parts, two for each tube. The tubes are generally mounted in nests or banks and the adjacent ones are connected to the return bend and in communication therewith. Outwardl projecting shoulders are formed on the tu es'adjacent the ends thereof, and the housing sections are provided with arcuate flanges which contact the shoulders on the tubes. Means are mounted in the housing sections-which are adapted'to draw the flanges upwardly and in turn the tubes and at the same time to press the return bend downwardly against the ends of the tubes thus forming a tight joint.

My invention has for its object to provide improved means for holding the houslng sec tions together and for a further object to accomplish that result without requiring wide centers for the tubes in the nest or bank.

My means of accomplishing the foregoing objects may be more readily understood by having reference to the accompanying drawing, which is hereunto annexed and made a part hereof, in which- Fig. is a side elevation of a return bend employing my improvement, a part of the wall being broken away to show the joint between the tube and return bend Fig. 2 is a vertical sectional view through one of the tubes, return bend proper and the housing sections; and

Fig. 3 is a plan View of means for securing the housing sections together.

Similar reference numerals refer to similar parts throughout the entire description.

As shown in the drawing, the housing comprises pairs of complementary sections 1 and 2, and 3 and 4. Though I have shown the compound housing made up of four sections it can well be made, if found desirable, in practice, in halves, the sections 13 and 24 being cast or forged together. The return bend 5 is mounted in the housings and is 1981, Serial No. 579,707. Divided and this application filed February 3, 1982. Serial No. 590,628.

preferably provided with V shaped grooves 6 in its faces 7. These grooves 6 are adapted to receive the ends 8 of the tubes 9 and 10 which are preferably convex in section to furnish a line contact with the V shaped grooves 6. Although I have shown a specific form of joint which I prefer for the splendid results secured in practice with one joint of this type, I do not desire to be understood as limiting myself thereto as many forms of joint may be employed in this device. On the tubes 9 and 10inasmuch as the construc tions are identical I'shall describe only oneI form a shoulder 11, which is engaged by shoulders 12 and 13 formed on sections 1--3 and 24 respectively. These sections have upwardly extending side walls, in which may be mounted set screws 14, the inner ends of which are adapted tocontact abutments 15 and 16 formed on the external wall of the return bend 5, the center being in line with the center of the tubes. The lower portions of the housing sections are each provided with integral extensions 17 which partially encircle the tubes. The outer surfaces 18 of these extensions are tapered. To these tapered surfaceslS I fit'a ring 19, the inner walls of which are correspondingly tapered so that when in place the housing sections 1 and 2, and 3 and 4 are held firmly together,

' this causes the shoulders 12 and 13 on the SGCiZlOIlStO interlock therewith so that by tightening the set screws 14 the tubes will be drawn tightly against the return bend 5 forming a tight joint. Although Ihave shown a rin 19 on each pair of extensions 17 it will e clear to persons skilled, in the art that they may be connected as by a web or plate 20 in the manner shown in the detail view Fig. 3. If desired, suitable means may be used to hold the plate up such as by bolts or screws, but I prefer the tapered surfaces for' that purpose. As illustrated I have shown the mounting means for the set screws 14 as consisting of a boss 21 formed on the section 1 provided with internal threads in which is mounted the set screw 14. The complementary section 2 is provided with a laterally extending portion 22 which has an aperture 23 formed therein which isritted ref spection of the drawing, it will be'a parent that the return bend 5 may be quic ly and conveniently removed, as it is very easy to loosen the set screws 14 and by removing the rings. 19 or plate 20 the sections may be removed afiording access to the return bend for removal which permits the removal or inspection of the tubes as desired.

Having described my inventionwhat I reard as new and desire to secure by Letters atent, is:

1. In a refinery apparatus, a return bend, a pair of shouldered tubes communicating therewith, a compound housing therefor,

comprising complementary sections adapted to partially encircle the ends of'saidtubes and to be locked to the shoulders on the tubes, detachable means mounted in said housing sections to hold said tubes and return bend in a tight joint, extensions on said housing sections which contact said tubes, securing means to contact said extensions and hold said sections together, the-outer surface of said extensions tapering downwardly and inwardly, said securing means having tapered apertures which fit said extensions whereby said sections'are held together.

2. In a refinery apparatus, a return bend, a pair of shouldered tubes communicatmg therewith, a compound housmg therefor, comprising complementary sections adapted to partially encircle the ends of said tubes and to be locked tothe shoulders on the tubes, detachable means mounted in said housing sections to hold said tubes and return bend in a tight joint, extensions on said housing sections which contact said tubes, securing means to contact said extensions and hold said sections together, the outer surface of said extensions tapering downwardly and inwardly, said securing means having tapered apertures which fit saidextensions whereby said sections are held together, and means to hold said securing means in place.

3. In a refinery apparatus, a return bend, a pair of shouldered tubes communicating therewith, a four-part compound housing therefor, comprising complementary sections adapted to partially encircle the ends of said tubes and to be locked to 'the shoulders on the tubes, detachable means mounted in said housing sections to hold said tubes and return bend in a tight joint, extensions on said housing tubes, securmg means to contact said extensions and hold said sections together, the

outer surface of said extensions tapering downwardly and inwardly, said securing means having tapered apertures which fit saidextensions whereby said sections are held together, and means 'to holdsaid securing means in place.

4. In a refinery apparatus, a return bend,

a pair of shouldered, tubes, communicating and to be locked to the shoulders on the tubes,

detachable means mounted in said housing sections to hold said tubes and return bend in a tight joint, extensions on said housing sections which-contact said tubes, a pair of rings to contact said extensions and hold said sections together, the outer surface of said extensions tapering downwardly and inwardly said rings having tapered apertures which fit said extensions whereby said sections are held together. a

5. In a refinery apparatus, a return bend, a pair of shouldered tubes communicating therewith, a compound housing therefor, comprising complementary sections adapted to artially encircle the ends of saidtubes and to be locked to the shoulders on the tubes, detachable means mounted in said housing sections to hold said tubes and return bend inv a tight joint, extensions on said housing sections which. contact said tubes, a plate having apertures therein adapted'to contact said extensions and hold said sections together, the outer surface of said extensions tapering downwardly and inwardly, to fit the aperture in said plate.

6. In a refinery apparatus, a return bend, a pair of shouldered tubes, communicating therewith, a four-part compound housing therefor, comprising complementary sections adapted to partially encircle the ends of said tubes and to be lockedto the shoulders on the tubes, detachable means mounted in said housing sections to hold said tubes and return bend in a tight joint, extensions on said vhousing sections which contact said tubes, a plate having apertures therein adapted to contact said extensions and hold said sections together, the outer surface of said extensions tapering downwardly and inwardly, to fit the aperture in said plate, and means to hold. said securing means in place.

In witness whereof, I hereunto set my hand.

FRED C. FANTZ.

sections which contact said 

